When I was around 4 I had an imaginary friend named Webbin (like Websters Dictionary) and I would always tell my sisters about how Webbin came over while they were at school and how we went to all these really cool places. And since my mom is awesome she would play along until she realized my sisters thought he was real!! They would get soooo upset because he only came over while they were gone and we always did such fun stuff while he was there. Its definitely worth it. =)